Reverse String

Easy Stack: Applications PRO
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Problem Statement

Write a C program to reverse a given string using a stack.

Input Format

A string without spaces.

Output Format

Print the reversed string.

Constraints

1 <= string length <= 100

Sample Input

hello

Sample Output

olleh

Explanation

Push all characters of the string onto a stack, then pop them one by one to form the reversed string.

Starter Code

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main() {
    char str[100];
    if (scanf("%s", str) == 1) {
        // Write your code here to reverse string using stack
    }
    return 0;
}

Limits

  • Time Limit: 1s
  • Memory Limit: 256MB

Embedded C Programming

Updated: March 15, 2026
Intermediate

Embedded systems rely on efficient low-level programming to interact directly with hardware. In this course, you will learn how to write practical Embedded C programs used in real microcontroller-based systems. Rather than focusing only on theory, this course follows a practice-driven approach. Each lesson includes hands-on coding exercises that simulate real firmware development tasks used